Quadrics
二次型
🗣️ 情景例句
He was dumb from birth.
他生下来就是哑巴。
Do you have any friends?
你有朋友吗？
About England? What a good idea! Maybe I could talk about English names.
英国的情况？多好的主意啊！也许我可以谈谈英国人的名字。